New data from UNICEF indicates that 25 million child marriages were averted over the last decade, proving that child marriage is not an intractable problem. Despite good news, progress has been uneven, and about one in five girls worldwide are married before the age of 18.

Deployed around the world, the armed forces are a pillar of U.S. power and influence abroad. But many civilians are unfamiliar with their composition. How much does the military resemble U.S. society at large?